Drying device for the lavatory



Marsh 23 F926.

. w. o, LUM

DRYING mavm: FOR THE LAVAIORY Filed July 28, 1921 2 Shee'ts -Sheet 1 w No 51/5/1 Q Lam wfflj March 23,1926, 11,578,047 7 W. O. LUM

DRYING DEVICE FOR THE LAVATORY Filed July 28, '1921 2 Sheets-Sheet 2 nome c $2M ,g d/ 4551M 0 Law I drier.

Patented Mar. 23, 1926.

. UNITED: STATES 1,578,047 PATENT OFFICE.

WALTER 0. LIFE, OF BROOKLYN, NEW YORK, ASSIGNOR T BLO-DRY INCORPORATED, OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

DRYING DEVICE FOR THE LAVATOBY.

Application filed July 28, 1921. Serial No. 488,261.

To all'wkom it may concern:

Be it known that I, WALTER O. LUM, a

' citizen of the United States, residing at such devices ave heretofore been large and expensive and easily damaged by careless users. It is one object of this invention to sim lify existing constructions of electric driers of this character and to render them as near fool proof as possible. A further object of the invention, allied with the first, is to render the' shutting off of the current through the heating coil entirely au tomatic and out of the control of the user, so that there will be no danger of the cur- .rent remaining on after the user has dried his hands. A still further object of the invention is to so construct the inlet and outlet for the air as to prevent the possibility of boys or other mischievous ersons stopping the circulation through t e machine by placing their hands over either aperture.

Further objects of the invent-ion will become apparent as the description proceeds.

Referring to the drawings, in which what I now consider the preferred forms of my invention are shown:

Fig. 1 is a vertical section through the Fig. 2 isa vertical section, partly in elevation, taken'atright angles to Fig. 1.

Fig. 3 is a detail of the cam and lever for operating the circuit breaking switch.

Fig. 4 is a wiring diagram showing the preferred connections between the master switch, motor, heating coil and circuit breaking switch.

Fig. 5 is a side elevation of said circuit breaking switch.

Fig. 6 is a plan view of the same.

Figs. 7 8 and 9 are wiring, diagrams of three modified forms of connections.

The device is shown as enclosed within a v housing 1 which may be provided with a foot 2 (broken awa in Fig. 1) for securing it to the wall. Sai housing is shown as made in two parts, the cover 3 being detachable and carrying the nozzle or outlet pipe 4. Said pipe is preferably covered'at its outer end by a stout wire screen or guard 4' of convex shape so that the outlet cannot be completely covered by the hand, for the purpose above described. Within said housing is an inner casing 5 enclosing the blower 6 and supporting the driving motor 7, the motor casing being shown as secured directly to said casing as by set screws 8. Said casing 15 extended to one side to form an 1nner nozzle or outlet pipe 9 so that the nozzle of the device is in two parts, the outer portion 4 being integral with the cover or housing. A slip joint 10 is provided between the two portions to ensure a good fit. I also prefer to mount the heatin unit 11 directly in the nozzle and pre erably within the inner or stationary portion thereof, thereby applying the heat to air as close as pomible to the point where it is used and avoiding the heating up of the whole interior of the casing and its motor. Said coil 11 may be composed of any standard heater wire and referably has incorporated therein a fusible section 12 adapted to open the coil circuit upon rise in temperature of the coil beyond safe limits from any-cause. A thermometer 14 may also be located with its bulb 15 within the nozzle to show to the user the temperature of the issuing air. Users of machines of this nature very often complain that the air feels cold, when it is in reality warm, evaportion of the moisture on their hands makes it feel cold. Suitable inlets for the air-are shown at 16 and 17. If more than as the one are provided it is not so necessary that by a convex guard 4", since the stoppage of one hold will not shut oil the air supply. After enter ng the housing 1, the air is-drawn into thecentral aperture 18 of easing 5 by the blower 6 and 1s forced outwardly through the nozzle 9.

A push button for the'operato'r or user is shown at 19 but as state above, I prefer to rovide an automatically operated switch and preferabl hot the coil and motor 011'- cuits. For t is purpose I have shown a train of double reductignworm gearing operated by the motor comprising a worm 20 they be covered on an extension of the motor blower shaft rating member desi meshing with a worm wheel 21 on alvertical stub shaft 22. On said shaft is a second 'Fig. 5 when the lever 27 passes oif the point 33 of cam 26 (Fig. 3). The contacts being opened, the motor will immediately stop. For an understanding of the circuits employed reference is had to the wiring diagram (Figs. 4 and 7-9) In Fig. 4 both switches 30 and 31 are 1n both the motor and coil circuits, when the push button 19 is closed the motor and coil eing in parallel. It will also'be seen that when the push button is open both the motor and coil will still remain in the circuit as long as the switches 30 and 31 are closed. When, however, these switches are open both the motor-and coil will be thrown out of circuit. When. the push button is closed and while switches 30 and 31 are open, the motor only is thrown into circuit until a revolution of the cam closes switches 30 and 31 as ex lained.

' ig. 7 shows an arrangement accomplishing substantiall the same results. The switches 30' an ever, are located in slightly different positions in the circuit. In this case the push button 19 and the switch 30' are arallel while the switch. 31' is in series wlth the coil, both coil and switch 31 being in parallel with the motor.

Fig. 8 shows a still simpler arrangement in which the push button 19 and the motor are in series in one circuit and the coil and the two switches 30' and31' are in series in a parallel circuit. In all of the cases above described, however, it should be noted that the dpush button is never called u n to ban e the heavy currents required or the heating coil but only handles the much smaller current-for the motor.

. which the switches 40 and 41 are designed to be manuall closed, but are opened by the cam 26 as in 0 other forms. From the foregoing descri tion it will be evident thatjin all but the sat form mendo is to-press his hands over thereb 7 closing the switches 30, 31 energizing t e' heatng coil.

31" in this instance, how- Fig. 9 illus-. trates a very simple form of connections in The motor will then continue to run for a redete'rmined interval which is determined hy experiment tosbe suflicient for drying the hands and then will be'automatically cut ofl and the circuit of the coil broken by the opening of switches 30 and 31.

In accordance with the provisions of the patent statutes, I have herein described; the

principle of operation of gether'with the apparatus, eh I nowconsider to represent the best embodiment thereof, but I desire to have it understood that the ap aratus shown is only illustrative and that the invention can be carried out by other means. Also, while it is designed to use the various features and elements in the combination and relations described, some of these may be altered and others omitted without interfering with the more general results outlined, and the invention extends to such use.

Having described my invention what I claim and. desire by Letters Patent is:

1. In a dryin device for the hands and" lower and a case therefor,

face, a motor, a havin an inlet and an outlet, a heat' g coil locate within said outlet, and a comp etel enveloping cover member having an outlet coinciding with said blower case outlet and arranged to enclose and contain said blower, blower case and motor.

'2. In a drying device for the hands and face, a housing having an outlet, a motor driven blower within said housin a heating coil located within said hOllSlD adjacent this outlet, a manually opera switch also on said housin for energizing said coil and starti or said lower, and means operable by said motor for stoppin said blower and deenergizin said c011 a or a prede termined interva of time. '3. In a drying device for the lavatory, the combination with a motor driven blower, an electrically heated coil and a common casing therefor, of manually operated means for closing a circuit or circuits to cause energization of the motor and coil, reduction gearing operated by said motor and a switch also in said casing operable by said gearing for breaking said motor and coil circuits after a predetermined number of revolutions of said motor.

4. In a dryin combination wit a motor driven blower and an electrically heated coil, of manually o a circuit or circuits motor and coil circuits after a mined'number of revolutions of said motor.

5. In a drying face, the combination of a motor driven blower and an electrically heated coil with my1 invention, tow 1 device for the hands anddevice for the lavatory, the

evee-r? a normally open manually operated motor switch, a normal'open motor operated coil switch adapted to simultaneously close the circuit of said motor and short circuit said manually operated motor switch and after a predetermined interval of time to open the circuits of both motor and coil.

6. Ina dryin device for the hands and face a housing aving an outlet a, motor driven blower within said housing, a heating coil locatedwithin said housing adjacent this outlet, a manually operated switch also on said housing for energizing said coil and starting said blower, and means operable by said motor for stopping; said blower and de energizing said coil after a predetermined interval of time, a fusible member electrically connected in series with said coil and physically located adjacent to said coil and within said outlet.

7. In a drying" device for the hands and face the combination of a motor driven blower, an electrically heated coil, contact switch electrically connected with said motor and coil with means operable by said motor for opening said switch after a predetermined number of motor revolutions.

8. In a drying device for the hands and face the motor driven blower and case therefor having an inlet consisting of a coextensive opening about the peri hery of the cover and supporting base an an outlet, a heating coil located within said outlet, and a completely enveloping cover member having an outlet coinciding with said blower case outlet and arranged to enclose and contain said blower, blower case and motor.

In testimony whereof I have affixed my signature.

VIALTER O. LUM. 

